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Natural environment
Related to any physical feature of the earth's natural environment.
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Natural environment > Volcano 
shield volcano
Natural environment; Volcano
A gently sloping volcano in the shape of a flattened dome and built almost exclusively of lava flows.
strombolian eruption
Natural environment; Volcano
A type of volcanic eruption characterized by jetting of clots or fountains of fluid basaltic lava from a central crater.
tremor
Natural environment; Volcano
Low amplitude, continuous earthquake activity often associated with magma movement.
viscosity
Natural environment; Volcano
A measure of resistance to flow in a liquid (water has low viscosity while honey has a higher viscosity. )
vesicle
Natural environment; Volcano
A small air pocket or cavity formed in volcanic rock during solidification.
tephra
Natural environment; Volcano
Materials of all types and sizes that are erupted from a crater or volcanic vent and deposited from the air.
Sub-categories
- Air (43)
- Atmosphere (59)
- Climate (1147)
- Climate change (10457)
- Coral reefs (23903)
- Deserts (738)
- Earthquake (7143)
- Flood (34)
- Forests (37)
- Grassland (35)
- Land mass (144)
- Landslide (66)
- Mountains (203)
- Plateau (39)
- Speleology (1857)
- Volcano (5852)
- Water (18527)